CN103435854B - Crystalline silicon solar battery electrode slurry organic carrier and preparation method thereof - Google Patents
Crystalline silicon solar battery electrode slurry organic carrier and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of crystalline silicon solar battery electrode slurry organic carrier and preparation method thereof, by massfraction, this organic carrier comprise 5% ~ 20% organic resin, the organic solvent of 60% ~ 85%, the thixotropic agent of 1% ~ 10% and 1% ~ 10% wetting dispersing agent.Preparation method comprises the following steps: (1), by organic resin and organic solvent mixed dissolution, obtains transparent resin solution; (2) thixotropic agent and wetting dispersing agent are added in transparent resin solution mix and activate, obtain crystalline silicon solar battery electrode slurry organic carrier.Organic carrier thixotropy of the present invention is good, shear shinning successful, can print the thin gate electrode line of large ratio of height to width and printed resolution is high, and preparation method's technique is simple, easy to operate and with low cost.
Description
Technical field
The present invention relates to crystal silicon solar energy battery field, be specifically related to a kind of crystalline silicon solar battery electrode slurry organic carrier and preparation method thereof.
Background technology
For crystal silicon solar energy battery, in order to export the electric energy of battery, positive and negative two electrodes must be made on battery.The making method of current commercial crystal silicon solar battery electrode is that printed back aluminium paste, back silver are starched and front side silver paste respectively on the silicon chip made, and then forms electrode by once burning altogether.As the critical material that the back of the body aluminium of the indispensable material of crystal silicon solar energy battery metallization operation, back of the body silver and positive silver paste are needed for crystal silicon solar energy battery element manufacturing, the quality of its performance will directly affect the properties of crystal silicon solar energy battery.The complex system that electrode slurry is made up of conducting powder, inorganic bond phase and organic carrier three kinds of materials, wherein organic carrier is also known as organic binder bond, Main Function is dispersed in wherein by metal-powder, glass powder inorganic phase, form high viscosity thixotropy paste fluid, there is suitable viscosity and rheological characteristics, can silk screen printing be realized.Organic carrier is made up of solvent, thickening material, thixotropic agent, rheological agent and tensio-active agent etc. usually, should be conducive to the dispersed of inorganic powder, and can remain stable in making, transport, storage and printing process.
In crystal silicon solar energy battery metallization process, positive silver paste is formed after positive pole pattern through silk screen printing, tight ohmic contact is formed through sintering and Si sheet, play the effect of electric current collection and derivation, but sun power front electrode is printed on while silicon substrate surface plays electrode effect, also exists and blocks, in order to reduce the loss because blocking generation to the sun, general requirement slurry possesses the printing capability of less than 70 μm fine rules, makes the grid line printed have better depth-width ratio.For realizing the high thixotropic of slurry, to obtain the electrode pattern of large ratio of height to width, often thixotropic agent is added with in organic carrier, in addition, also the auxiliary agents such as wetting dispersing agent, tackifier and deaerating agent are often added with in organic carrier, final slurry is become there is certain thixotropic pseudoplastic fluid, and make slurry very fast to low sheraing process medium viscosity resume speed by high-shear.
But, traditional organic carrier only focuses on the mobility of slurry, i.e. impressionability, and ignore the viscosity recovery situation after slurry shearing thinning characteristics and shear-thinning, the slurry prepared is caused to have difficulties when printing the thin gate electrode line of large ratio of height to width, the rete printed easily cave in thus make rete broadening, highly decline, and then increase the shading-area of gate electrode line, have impact on efficiency of conversion.Therefore, need to find new material or method to make while silk-screen, powder dispersiveness in the slurry to be improved, improve the thixotropy of slurry and the ability of the thin gate electrode line of printing large ratio of height to width at guarantee slurry.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, there is provided a kind of and make that the slurry thixotropy of preparation is good, dispersed and storage stability is good, shear shinning successful, viscosity recovery fast, the thin gate electrode line of large ratio of height to width can be printed and the high crystalline silicon solar battery electrode slurry organic carrier of printed resolution, the preparation method of the crystalline silicon solar battery electrode slurry organic carrier also providing a kind of technique simple, easy to operate, with low cost.
For solving the problems of the technologies described above, the technical solution used in the present invention is a kind of crystalline silicon solar battery electrode slurry organic carrier, and described organic carrier comprises the component of following massfraction:
Organic resin 5% ~ 20%,
Organic solvent 60% ~ 85%,
Thixotropic agent 1% ~ 10%, and
Wetting dispersing agent 1% ~ 10%.
In above-mentioned organic carrier, preferably, described organic resin comprises one or more in ethyl cellulose, acrylic resin, rosin and derivative thereof, resol.
In above-mentioned organic carrier, preferably, described organic solvent comprises 2,2, one or more in 4-trimethylammonium-1,3-pentanediol mono isobutyrate (i.e. alcohol ester 12), epoxidized tall oil lipid acid (i.e. 2-ethylhexyl), hexanodioic acid two [2-(2-Butoxyethoxy) ethyl ester], diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Terpineol 350, dipropylene glycol methyl ether, propylene glycol monomethyl ether, tributyl citrate, ethylene glycol phenyl ether, dibutyl phthalate, dioctyl phthalate (DOP) and nylon acid dimethyl ester (DBE).
In above-mentioned organic carrier, preferably, described thixotropic agent comprises one or more in hydrogenated castor oil and modifier, polyamide wax and modifier thereof.
In above-mentioned organic carrier, described wetting dispersing agent is anion surfactant and/or nonionogenic tenside, in described wetting dispersing agent surfactant HLB value add and preferably 5 ~ 14.
In above-mentioned organic carrier, described wetting dispersing agent preferred N-tallow base-1,3-propylene diamine two oleate.
As a total technical conceive, present invention also offers a kind of preparation method of crystalline silicon solar battery electrode slurry organic carrier, comprise the following steps:
(1) dissolving of organic resin: by massfraction, take the organic resin of 5% ~ 20% and the organic solvent of 60% ~ 85% mixes, then at 50 DEG C ~ 100 DEG C, heated and stirred to organic resin dissolves (being now transparent liquid) completely, then is cooled to room temperature, obtains transparent resin solution;
(2) activation of thixotropic agent: by massfraction, take the thixotropic agent of 1% ~ 10% and the wetting dispersing agent of 1% ~ 10%, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains, then at 50 DEG C ~ 80 DEG C, gained mixed solution is heated, apply shearing action to mixed solution simultaneously, until thixotropic agent activation becomes transparent liquid, be cooled to room temperature (being generally 5 DEG C ~ 35 DEG C) again, obtain crystalline silicon solar battery electrode slurry organic carrier (this organic carrier is at room temperature in solid paste).
In above-mentioned method, preferably, described organic resin comprises one or more in ethyl cellulose, acrylic resin, rosin and derivative thereof, resol; Described organic solvent comprises 2,2, one or more in 4-trimethylammonium-1,3-pentanediol mono isobutyrate, epoxidized tall oil lipid acid, hexanodioic acid two [2-(2-Butoxyethoxy) ethyl ester], diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Terpineol 350, dipropylene glycol methyl ether, propylene glycol monomethyl ether, tributyl citrate, ethylene glycol phenyl ether, dibutyl phthalate, dioctyl phthalate (DOP) and nylon acid dimethyl ester (DBE).
In above-mentioned method, preferably, described thixotropic agent comprises one or more in hydrogenated castor oil and modifier, polyamide wax and modifier thereof.
In above-mentioned method, described wetting dispersing agent is anion surfactant and/or nonionogenic tenside, in described wetting dispersing agent surfactant HLB value add and preferably 5 ~ 14.
In the present invention, the optimum amount of organic resin can be determined according to the viscosity requirement of the oil-absorption(number) of conductive powder in electrode slurry and electrode slurry, and organic resin mainly plays thickening and improves the elastic effect of slurry.Preferably, organic resin comprises high molecular weight resin and low-molecular-weight resin (generally defining the resin that molecular weight is less than 1W is low-molecular-weight resin) simultaneously, high molecular weight resin can increase viscosity and the visco-elasticity of organic carrier and electrode slurry, but high molecular weight resin too much in organic carrier easily causes electrode slurry to reel off raw silk from cocoons, affect the silk screen printing performance of electrode slurry, and adopt height two kinds of molecular weight resin carry out reasonably combined be conducive to improve electrode slurry viscoelastic while, avoid reeling off raw silk from cocoons, as the collocation of high-molecular-weight ethyl Mierocrystalline cellulose and low-molecular-weight rosin and derivative thereof.
The activating process of thixotropic agent is relevant with the kind of thixotropic agent, and usually, the activation temperature of hydrogenated castor oil should to control below 50 DEG C and to apply moderate shearing action, and the activation temperature of polyamide wax is generally no more than 80 DEG C.
Wetting dispersing agent is mainly selected according to the characteristic of silver powder in electrode slurry and glass powder surface hydrophilic, oleophylic.
Compared with prior art, the invention has the advantages that:
(1) organic carrier of the present invention comprises the low ash organic resin of different sorts and molecular weight, high boiling solvent, thixotropic agent and the contour performance composition of wetting dispersing agent, can realize the dispersed of conductive powder and unorganic glass powder in this organic carrier; The crystalline silicon solar battery electrode slurry prepared with organic carrier of the present invention has good thixotropy and visco-elasticity, and storage stability is good, shear shinning successful and after shear-thinning viscosity recovery fast, can print large ratio of height to width fine rule, printed resolution is high.
(2) organic carrier of the present invention while guarantee crystalline silicon solar battery electrode slurry silk screen printing performance, effectively can improve the solid content of electrode slurry, improves rheological characteristics and the processing performance of electrode slurry.
(3) in the present invention, preparation method's technique of organic carrier is simple, easy to operate, with low cost, the organic carrier of preparation can be made to be effectively applied in crystalline silicon solar battery electrode slurry to the design of thixotropic agent and activating process thereof.
Accompanying drawing explanation
Fig. 1 is the viscosity-speed curves of the crystalline silicon solar battery electrode slurry organic carrier prepared in the embodiment of the present invention.
Fig. 2 is the viscosity-shear rate curve of crystal silicon solar energy battery anode sizing agent and certain model anode sizing agent external in the embodiment of the present invention 1 and embodiment 2.
Fig. 3 is crystal silicon solar energy battery anode sizing agent and the viscosity profile over time of certain model anode sizing agent external through three sections of shearing experiment gained in the embodiment of the present invention 1.
Embodiment
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
In the specific embodiment of the present invention, one or more in organic resin preferred, ethyl, acrylic resin, rosin and derivative thereof, resol;
Organic solvent preferably 2,2, one or more in 4-trimethylammonium-1,3-pentanediol mono isobutyrate, epoxidized tall oil lipid acid, hexanodioic acid two [2-(2-Butoxyethoxy) ethyl ester], diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Terpineol 350, dipropylene glycol methyl ether, propylene glycol monomethyl ether, tributyl citrate, ethylene glycol phenyl ether, dibutyl phthalate, dioctyl phthalate (DOP) and nylon acid dimethyl ester;
One or more in the preferred hydrogenated castor oil of thixotropic agent and modifier, polyamide wax and modifier thereof;
Wetting dispersing agent preferred anionic tensio-active agent and/or nonionogenic tenside, HLB value add and preferably 5 ~ 14.
Described in following examples, viscosity all refers to apparent viscosity.
embodiment 1:
A kind of crystalline silicon solar battery electrode slurry organic carrier of the present invention, comprise following component: 1.04g organic resin, 9.07g organic solvent, 0.5g thixotropic agent and 0.5g wetting dispersing agent, wherein, organic resin is by 0.187g ethyl cellulose 200, 0.053g ethyl cellulose 300 and 0.8g acrylic resin NeoCryl B-723 form, organic solvent is by 5.57g alcohol ester 12 (namely 2, 2, 4-trimethylammonium-1, 3-pentanediol mono isobutyrate) and 3.5g nylon acid dimethyl ester (DBE) composition, thixotropic agent is 0.5g polyamide wax MT ST, wetting dispersing agent is 0.5g N-tallow base-1, 3-propylene diamine two oleate, HLB value is 12.
A preparation method for the crystalline silicon solar battery electrode slurry organic carrier of the invention described above, comprises the following steps:
(1) dissolving of organic resin: take 0.187g ethyl cellulose 200,0.053g ethyl cellulose 300 and 0.8g acrylic resin NeoCryl B-723 as organic resin constituent, 5.57g alcohol ester 12 and 3.5g DBE are as organic solvent, organic resin and organic solvent are added in the heatable container with shearing action and mix, at 90 DEG C, heated and stirred 2h dissolves completely to organic resin becomes transparent liquid, then be cooled to room temperature, obtain transparent resin solution;
(2) activation of thixotropic agent: take 0.5g polyamide wax MT ST as thixotropic agent, 0.5g N-tallow base-1, 3-propylene diamine two oleate is as wetting dispersing agent, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains, gained mixed solution is heated, heating and temperature control is at 60 DEG C, apply the shearing action of medium tenacity (rotating speed is 1000rpm) to mixed solution simultaneously, maintain shearing action 30min, until thixotropic agent activation becomes transparent liquid completely, be cooled to room temperature again, obtain the crystalline silicon solar battery electrode slurry organic carrier of faint yellow paste.
The organic carrier prepared by above-mentioned the present embodiment measures apparent viscosity under the temperature of 25 DEG C, different rotating speeds, apparent viscosity adopts the test of Brookfield HBDV-II type viscometer, used is SC4-14/6R low-volume samples testing rotor system, and the viscosity-speed curves obtained as shown in Figure 1.As seen from the figure, this organic carrier is the pseudoplastic fluid with obvious shear shinning characteristic, and under 1rpm and 10rpm rotating speed, viscosity is respectively 590Pas and 120Pas.
The organic carrier adopting above-mentioned the present embodiment to prepare is to prepare crystal silicon solar energy battery anode sizing agent, wherein the quality of organic carrier is 9.3g, the quality of silver powder is 88.2g, the quality of glass powder is 2.5g, respectively glass powder and silver powder are added in organic carrier, after stirring, utilize the shearing action of three-roller to be pulled open by reunion powder, obtain the crystal silicon solar energy battery anode sizing agent that fineness is less than 10 μm.
The rheological property of Anton Paar rheometer to above-mentioned crystal silicon solar energy battery anode sizing agent is utilized to characterize, viscosity-the shear rate curve of the crystal silicon solar energy battery anode sizing agent obtained as shown in Figure 2, as seen from the figure, crystalline silicon solar battery electrode slurry viscosity-the shear rate curve adopting this organic carrier to prepare forms by three sections, when shearing rate is less than 0.1S
-1time, slurry viscosity is less with shear rate change amplitude, slurry viscosity with shear rate change at 0.1 ~ 1S
-1interval exist a platform, and along with the continuation of shearing rate increases after platform area, slurry viscosity can linearly reduce by a relatively large margin.Adopt the test of Brookfield HBDV-II type viscometer to learn, the apparent viscosity of above-mentioned crystal silicon solar energy battery anode sizing agent under 10rpm is 229Pas.Viscosity-the shear rate curve of certain model anode sizing agent external as shown in Figure 2, anode sizing agent viscosity-shear rate curve shape prepared by the present embodiment is similar to external anode sizing agent, but viscosity is a little more than external anode sizing agent, anode sizing agent prepared by the present embodiment is at 0.4S
-1and 4S
-1under viscosity be respectively 2380Pas and 284Pas, external anode sizing agent is respectively 1760Pas and 213Pas.
Carry out three sections of shearing experiments (3ITT) to above-mentioned crystal silicon solar energy battery anode sizing agent, its testing method is respectively at 1s
-1, 500s
-1and 1s
-1the viscosity of lower continuously tested anode sizing agent, observes anode sizing agent through 500s
-1the recovery situation of viscosity after high-shear, the viscosity profile over time obtained as shown in Figure 3, as seen from the figure, above-mentioned crystal silicon solar energy battery anode sizing agent after high-shear in 1s viscosity recovery degree be 22.6%(the 3rd section of 1S
-1the viscosity number of first point is divided by first paragraph 1S
-1the viscosity average of lower last five points).The viscosity profile over time of external anode sizing agent (identical with aforesaid external anode sizing agent model) as shown in Figure 3, the relatively external anode sizing agent of anode sizing agent prepared by the present embodiment has viscosity recovery speed faster after high shear forces, and this structure fast or viscosity recovery speed are conducive to the acquisition of silk screen printing large ratio of height to width fine rule.
In addition, known after testing, the fineness <10 μm of crystal silicon solar energy battery anode sizing agent prepared by above-mentioned the present embodiment, storage stability >6 month, printed resolution was 50 μm.
embodiment 2:
A kind of crystalline silicon solar battery electrode slurry organic carrier of the present invention, comprise following component: 2.86g organic resin, 15.103g organic solvent, 1.0g thixotropic agent and 0.5g wetting dispersing agent, wherein, organic resin is made up of 0.28g ethyl cellulose 200,0.08g ethyl cellulose 300 and 2.5g acrylic resin NeoCryl B-842, organic solvent is made up of 8.355g alcohol ester 12 and 6.748g DBE, thixotropic agent is 1.0g polyamide wax MT ST, wetting dispersing agent is 0.5g N-tallow base-1,3-propylene diamine two oleate, HLB value is 12.
A preparation method for the crystalline silicon solar battery electrode slurry organic carrier of the invention described above, comprises the following steps:
(1) dissolving of organic resin: take 0.28g ethyl cellulose 200,0.08g ethyl cellulose 300 and 2.5g acrylic resin NeoCryl B-842 as organic resin constituent, 8.355g alcohol ester 12 and 6.748g DBE are as organic solvent, organic resin and organic solvent are added in the heatable container with shearing action and mix, at 90 DEG C, heated and stirred 2h dissolves completely to organic resin becomes transparent liquid, then be cooled to room temperature, obtain transparent resin solution;
(2) activation of thixotropic agent: take 1.0g polyamide wax MT ST as thixotropic agent, 0.5g N-tallow base-1, 3-propylene diamine two oleate is as wetting dispersing agent, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains, gained mixed solution is heated, heating and temperature control is at 60 DEG C, apply the shearing action of medium tenacity (1000rpm) to mixed solution simultaneously, maintain shearing action 30min, until thixotropic agent activation becomes transparent liquid completely, be cooled to room temperature again, obtain the crystalline silicon solar battery electrode slurry organic carrier of faint yellow paste.
The organic carrier prepared by above-mentioned the present embodiment measures apparent viscosity under the temperature of 25 DEG C, different rotating speeds, and the viscosity-speed curves obtained as shown in Figure 1.As seen from the figure, this organic carrier is the pseudoplastic fluid with obvious shear shinning characteristic, and under 1rpm and 10rpm rotating speed, viscosity is respectively 300Pas and 84Pas.
The organic carrier adopting above-mentioned the present embodiment to prepare is to prepare crystal silicon solar energy battery anode sizing agent, wherein the quality of organic carrier is 9.3g, the quality of silver powder is 88.2g, the quality of glass powder is 2.5g, respectively glass powder and silver powder are added in organic carrier, after stirring, utilize the shearing action of three-roller to be pulled open by reunion powder, obtain crystal silicon solar energy battery anode sizing agent.
The rheological property of Anton Paar rheometer to above-mentioned crystal silicon solar energy battery anode sizing agent is utilized to characterize, viscosity-the shear rate curve of the crystal silicon solar energy battery anode sizing agent obtained as shown in Figure 2, as seen from the figure, anode sizing agent viscosity-shear rate curve shape prepared by the present embodiment is similar to external anode sizing agent, viscosity is basic suitable with external anode sizing agent, and the anode sizing agent of preparation is at 0.4S
-1and 4S
-1under viscosity be respectively 2260Pas and 236Pas, external anode sizing agent is respectively 1760Pas and 213Pas.Learn after tested, the apparent viscosity of crystal silicon solar energy battery anode sizing agent under 10rpm prepared by above-mentioned the present embodiment is 210Pas.
Known after testing, above-mentioned crystal silicon solar energy battery anode sizing agent after high-shear in 1s viscosity recovery degree be 20.9%, fineness <10 μm, storage stability >6 month, printed resolution was 50 μm.
embodiment 3:
A kind of crystalline silicon solar battery electrode slurry organic carrier of the present invention, comprise following component: 2.86g organic resin, 17.488g organic solvent, 1.0g thixotropic agent and 0.5g wetting dispersing agent, wherein, organic resin is made up of 0.28g ethyl cellulose 200,0.08g ethyl cellulose 300 and 2.5g acrylic resin NeoCryl B-805, organic solvent is made up of 10.74g alcohol ester 12 and 6.748g DBE, thixotropic agent is 1.0g polyamide wax MT ST, wetting dispersing agent is 0.5g N-tallow base-1,3-propylene diamine two oleate, HLB value is 12.
A preparation method for the crystalline silicon solar battery electrode slurry organic carrier of the invention described above, comprises the following steps:
(1) dissolving of organic resin: take 0.28g ethyl cellulose 200,0.08g ethyl cellulose 300 and 2.5g acrylic resin NeoCryl B-805 as organic resin constituent, 10.74g alcohol ester 12 and 6.748g DBE are as organic solvent, organic resin and organic solvent are added in the heatable container with shearing action and mix, at 90 DEG C, heated and stirred 2h dissolves completely to organic resin becomes transparent liquid, then be cooled to room temperature, obtain transparent resin solution;
(2) activation of thixotropic agent: take 1.0g polyamide wax MT ST as thixotropic agent, 0.5g N-tallow base-1, 3-propylene diamine two oleate is as wetting dispersing agent, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains, gained mixed solution is heated, heating and temperature control is at 60 DEG C, apply the shearing action of medium tenacity (1000rpm) to mixed solution simultaneously, maintain shearing action 30min, until thixotropic agent activation becomes transparent liquid completely, be cooled to room temperature again, obtain the crystalline silicon solar battery electrode slurry organic carrier of faint yellow paste.
The organic carrier prepared by above-mentioned the present embodiment measures apparent viscosity under the temperature of 25 DEG C, different rotating speeds, and the viscosity-speed curves obtained as shown in Figure 1.As seen from the figure, this organic carrier is the pseudoplastic fluid with obvious shear shinning characteristic, and under 1rpm and 10rpm rotating speed, viscosity is respectively 680Pas and 58Pas.
The organic carrier adopting above-mentioned the present embodiment to prepare is to prepare crystal silicon solar energy battery anode sizing agent, wherein the quality of organic carrier is 9.3g, the quality of silver powder is 88.2g, the quality of glass powder is 2.5g, respectively glass powder and silver powder are added in organic carrier, after stirring, utilize the shearing action of three-roller to be pulled open by reunion powder, obtain crystal silicon solar energy battery anode sizing agent.
Known after testing, the apparent viscosity that above-mentioned crystal silicon solar energy battery anode sizing agent employing Brookfield HBDV-II type viscometer is tested under the 10rpm obtained is 259Pas, after high-shear, in 1s, viscosity recovery degree is 27.1%, fineness <10 μm, storage stability >6 month, printed resolution was 50 μm.
embodiment 4:
A kind of crystalline silicon solar battery electrode slurry organic carrier of the present invention, comprise following component: 3.5g organic resin, 18.14g organic solvent, 1.0g thixotropic agent and 1.0g wetting dispersing agent, wherein, organic resin is made up of 1.0g ethyl cellulose 200 and 2.5g pentalyn, organic solvent is made up of 11.14g alcohol ester 12 and 7.0g DBE, and thixotropic agent is 1.0g hydrogenated castor oil, and wetting dispersing agent is 1.0g N-tallow base-1,3-propylene diamine two oleate, HLB value is 12.
A preparation method for the crystalline silicon solar battery electrode slurry organic carrier of the invention described above, comprises the following steps:
(1) dissolving of organic resin: take 1.0g ethyl cellulose 200 and 2.5g pentalyn as organic resin constituent, 11.14g alcohol ester 12 and 7.0g DBE are as organic solvent, organic resin and organic solvent are added in the heatable container with shearing action, at 90 DEG C, heated and stirred 2h dissolves completely to organic resin becomes transparent liquid, then be cooled to room temperature, obtain transparent resin solution;
(2) activation of thixotropic agent: take 1.0g hydrogenated castor oil as thixotropic agent, 1.0g N-tallow base-1, 3-propylene diamine two oleate is as wetting dispersing agent, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains and mix, gained mixed solution is heated, heating and temperature control is at 50 DEG C, apply the shearing action of medium tenacity (1000rpm) to mixed solution simultaneously, maintain shearing action 40min, until thixotropic agent activation becomes transparent liquid completely, be cooled to room temperature again, obtain the crystalline silicon solar battery electrode slurry organic carrier of faint yellow paste.
The organic carrier prepared by above-mentioned the present embodiment measures apparent viscosity under the temperature of 25 DEG C, different rotating speeds, and the viscosity-speed curves obtained as shown in Figure 1.As seen from the figure, this organic carrier is also the pseudoplastic fluid with obvious shear shinning characteristic, and under 1rpm and 10rpm rotating speed, viscosity is respectively 360Pas and 45Pas.
The organic carrier adopting above-mentioned the present embodiment to prepare is to prepare crystal silicon solar energy battery anode sizing agent, wherein the quality of organic carrier is 9.3g, the quality of silver powder is 88.2g, the quality of glass powder is 2.5g, respectively glass powder and silver powder are added in organic carrier, after stirring, utilize the shearing action of three-roller to be pulled open by reunion powder, obtain crystal silicon solar energy battery anode sizing agent.
Known after testing, the apparent viscosity that the test of above-mentioned crystal silicon solar energy battery anode sizing agent employing Brookfield HBDV-II type viscometer obtains under 10rpm is 254Pas), after high-shear, in 1s, viscosity recovery degree is 25.5%, fineness <10 μm, storage stability >6 month, printed resolution was 50 μm.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.All technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It is noted that for those skilled in the art, improvements and modifications under the premise without departing from the principles of the invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a crystalline silicon solar battery electrode slurry organic carrier, is characterized in that, described organic carrier comprises the component of following massfraction:
Organic resin 13.1% ~ 20%,
Organic solvent 60% ~ 80%,
Thixotropic agent 4.6% ~ 10%, and
Wetting dispersing agent 1% ~ 10%;
Described organic resin comprise in ethyl cellulose, acrylic resin, rosin and derivative thereof, resol one or more;
Described wetting dispersing agent is anion surfactant and/or nonionogenic tenside, and in described wetting dispersing agent, surfactant HLB value adds and be 5 ~ 14.
2. crystalline silicon solar battery electrode slurry organic carrier according to claim 1, it is characterized in that, described organic solvent comprises 2,2, one or more in 4-trimethylammonium-1,3-pentanediol mono isobutyrate, epoxidized tall oil lipid acid, hexanodioic acid two [2-(2-Butoxyethoxy) ethyl ester], diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Terpineol 350, dipropylene glycol methyl ether, propylene glycol monomethyl ether, tributyl citrate, ethylene glycol phenyl ether, dibutyl phthalate, dioctyl phthalate (DOP) and nylon acid dimethyl ester.
3. crystalline silicon solar battery electrode slurry organic carrier according to claim 1, is characterized in that, described thixotropic agent comprise in hydrogenated castor oil and modifier, polyamide wax and modifier thereof one or more.
4. crystalline silicon solar battery electrode slurry organic carrier according to claim 1, is characterized in that, described wetting dispersing agent is N-tallow base-1,3-propylene diamine two oleate.
5. a preparation method for crystalline silicon solar battery electrode slurry organic carrier, comprises the following steps:
(1) dissolving of organic resin: by massfraction, take the organic resin of 13.1% ~ 20% and the organic solvent of 60% ~ 80% mixes, then at 50 DEG C ~ 100 DEG C, heated and stirred is dissolved completely to organic resin, then is cooled to room temperature, obtains transparent resin solution;
(2) activation of thixotropic agent: by massfraction, take the thixotropic agent of 4.6% ~ 10% and the wetting dispersing agent of 1% ~ 10%, thixotropic agent and wetting dispersing agent are added in the transparent resin solution that step (1) obtains, then at 50 DEG C ~ 80 DEG C, gained mixed solution is heated, apply shearing action to mixed solution simultaneously, until thixotropic agent activation becomes transparent liquid, then be cooled to room temperature, obtain crystalline silicon solar battery electrode slurry organic carrier;
Described organic resin comprise in ethyl cellulose, acrylic resin, rosin and derivative thereof, resol one or more;
Described wetting dispersing agent is anion surfactant and/or nonionogenic tenside, and in described wetting dispersing agent, surfactant HLB value adds and be 5 ~ 14.
6. preparation method according to claim 5, it is characterized in that, described organic solvent comprises 2,2, one or more in 4-trimethylammonium-1,3-pentanediol mono isobutyrate, epoxidized tall oil lipid acid, hexanodioic acid two [2-(2-Butoxyethoxy) ethyl ester], diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Terpineol 350, dipropylene glycol methyl ether, propylene glycol monomethyl ether, tributyl citrate, ethylene glycol phenyl ether, dibutyl phthalate, dioctyl phthalate (DOP) and nylon acid dimethyl ester.
7. preparation method according to claim 5, is characterized in that, described thixotropic agent comprise in hydrogenated castor oil and modifier, polyamide wax and modifier thereof one or more.
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